x86_64/string/bzero.c

   1 /*
   2  * Copyright (c) 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <machine/cpu_capabilities.h>
  25 #include "platfunc.h"
  26
  27 PLATFUNC_DESCRIPTOR_PROTOTYPE(bzero, sse42)
  28 PLATFUNC_DESCRIPTOR_PROTOTYPE(bzero, sse2)
  29
  30 static const platfunc_descriptor *bzero_platfunc_descriptors[] = {
  31         PLATFUNC_DESCRIPTOR_REFERENCE(bzero, sse42),
  32         PLATFUNC_DESCRIPTOR_REFERENCE(bzero, sse2),
  33         0
  34 };
  35
  36 void *bzero_chooser() __asm__("_bzero");
  37 void *bzero_chooser() {
  38         __asm__(".desc _bzero, 0x100");
  39         return find_platform_function((const platfunc_descriptor **) bzero_platfunc_descriptors);
  40 }